Mistake Continuity: Dumbledore tells Harry at the end that Lord Voldemort is the last remaining ancestor of Salazar Slytherin. But ancestors are in the past - he means Voldemort is the last descendant of Salazar Slytherin. Not a mistake Dumbledore would have made. (Corrected in later printings.) votemap Mistake Plot hole: During the Flourish and Blotts scene, Harry is presented with a complete set of his needed books by Lockhart. He then dumps these into Ginny's cauldron, mumbling ‘I’ll buy...